It could be.

A lot of times breast cancer doesn't hurt though.

Other factors that may contribute to breast pain in some women include:

• Oral contraceptive pills
• Hormone replacement therapy
• Weight gain
• Bras that do not fit properly
• Tumors (most painful tumors do not usually indicate breast cancer; however, all abnormalities should be examined by a physician. For example, some patients with inflammatory breast cancer describe "stabbing pains" in the breast.)

Evaluating Breast Pain

Women should report all complaints of persistent breast pain to their physicians. Physicians will evaluate the pain, taking into account the woman’s personal history, family history, the area of pain, the intensity and duration of the pain, and the extent to which the pain interferes with her lifestyle.

Physicians will also perform clinical breast examinations, and if necessary, order additional breast imaging exams (such as mammography or ultrasound) to help determine whether the pain is related to another breast condition or possibly cancer. If no breast abnormality is indicated, the physician and woman should decide together whether drug treatment is necessary.

Treating Breast Pain

Most women with moderate breast pain are not treated with medications or surgical procedures. The following suggestions have been shown to reduce breast pain in some women (although there is not sufficient scientific evidence to establish the effectiveness of any of these suggestions):

• Wear a good, supportive bra to reduce breast movement. Many women with breast pain find it comfortable to also wear a bra while they sleep.
• Limit sodium intake.
• Reduce caffeine intake (coffee, tea, soft drinks, chocolate).
• Maintain a low fat diet rich in fruits, vegetables, and grains.
• Maintain an ideal weight. Losing excess weight may reduce breast pain by stabilizing hormone levels.
• Occasionally use over-the-counter pain-relief drugs such aspirin, acetaminophen, or Motrin.
• Take vitamins. Some women have found that taking Vitamin B6 (pyridoxine), Vitamin B1 (thiamine), and Vitamin E relieves breast pain.
• Try evening primrose oil. Some women have found that regular consumption of the herb, evening primrose oil, in liquid or tablet form reduces breast pain.
• Cyst aspiration. Physicians sometimes drain benign (non-cancerous), fluid-filled cysts to relieve breast pain. It may not be possible to drain very small cysts.
• Relax. Some breast pain can be caused by stress and may subside by reducing anxiety and tension.

If breast pain is severe and interferes with a woman’s daily activities, further treatment may be necessary. Diuretics, substances that remove excess fluid from the body in the form of urine, are the most commonly prescribed treatment for persistent, non-cyclical breast pain. The release of fluid in the body helps decrease breast pain and swelling.

http://imaginis.com/breasthealth/breast_pain.asp

Hope that helps!
Kerry